3M™ Cloth Belt 577F features alumina zirconia abrasive grain for increased cutting efficiency over aluminum oxide belts, and is backed with a heavy, water-resistant polyester backing that stands up to high-pressure applications and edge work. The durable backing ensures long life and supports both wet and dry operations. The 3M™ Cloth Belt 577F is a versatile belt that can be run wet or dry. It is made of an aluminum zirconia abrasive mineral that cuts faster than aluminum oxide across all metal types. The heavy YF-weight cloth backing supports high pressure and tough applications. It also incorporates a grinding aid intended to reduce heat and improve performance when used on stainless steel and other exotic metals. The resin bonding withstands high heat and pressure for a longer service life. 3M™ Coated Belts are available in a variety of sizes and performance levels for all of your coated abrasive belt needs.